Mercer Island's Emergency Alert System

The City of Mercer Island has partnered with King County Emergency Management to keep residents informed during potential hazards, threats, and emergencies in the area.

Why Sign up for Emergency Alerts

ALERT King County is a regional emergency alert system that allows the City of Mercer Island to share important emergency information with registered users via telephone, text, and email.

During major emergencies, the City will use the emergency alert system to communicate important information to residents via a text, email, or automated phone call. All registered users will receive the alert simultaneously.

ALERT King County already includes most landlines, but by signing up, residents can select additional contact options. Unlike landlines, cellphones are NOT automatically included in the alert system. The City highly encourages residents who do not have a landline to sign up for ALERT King County. 

The system accepts multiple emails, phone numbers, and physical addresses for the same person. Sign up your home and/or work address to be contacted if there is an emergency at either location. 

How to Register

Register your physical address(es), email(s), and phone number(s) to receive important safety information during an emergency. Mercer Island residents will only receive alerts targeted to them, based on the address they provide. The service is free and confidential.* 

SUBSCRIBE

UNSUBSCRIBE

The system will only be used by the City for major emergencies (make sure to uncheck the "General Notifications" box).

Updating Contact Information

Users can update their information whenever changes are needed by simply subscribing again. Although not required, setting up a Username/Password allows greater flexibility.

*These records are exempt from public disclosure (RCW 38.52.577)